February 20, 200917 yr hi, my front brake pistons are stuck on my gasgas 125, how do i get them free? kibsy
February 20, 200917 yr Remove and disassemble the caliper. Using compressed air blow air where the fluid passes into the caliper. It is a good idea to have a rag wrapped around the caliper to catch the piston. Replace seals, clean and inspect (possibly replace) piston. Repeat for other half of caliper. Hope this helps.
February 20, 200917 yr If you don't have access to compressed air, remove the caliper and pads, leave the brake hose connected. Pump the piston out, clean up, replace seals, rebuild.
February 20, 200917 yr i used pipe grips on mine pumped the preasure up on the lever to see if thay moved slightly if not split the calliper make sure you dont lose the seal little o ring from the centre of the calliper got the pipe grips on twisted the pistons till thay popped removed the pistons carfully not too damage or score the pistons got 1200 wet and dry sand paper cleand the grime off them replaced them carfull not to damage the seals refiting the pistons you can buy a brake calliper piston fitting kit from machine mart hope this helps
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